Removed all instances of velocity being defined for `CharacterBody2D` (#6862)

* Removed all instances of velocity being defined for `CharacterBody2D`

tutorials/3d/using_transforms.rst

@@ -293,7 +293,7 @@ Jump:
     if Input.is_action_just_pressed("jump"):
         velocity.y = JUMP_SPEED
 
-    velocity = move_and_slide(velocity)
+    move_and_slide()
 
  .. code-tab:: csharp
 
@@ -301,7 +301,7 @@ Jump:
     if (Input.IsActionJustPressed("jump"))
         velocity.Y = JumpSpeed;
 
-    velocity = MoveAndSlide(velocity);
+    MoveAndSlide();
 
 All common behaviors and logic can be done with just vectors.
 

tutorials/physics/kinematic_character_2d.rst

@@ -149,7 +149,6 @@ little more like a regular game character:
     extends CharacterBody2D
 
     const GRAVITY = 200.0
-    var velocity = Vector2()
 
     func _physics_process(delta):
         velocity.y += delta * GRAVITY
@@ -164,7 +163,6 @@ little more like a regular game character:
     public partial class PhysicsScript : CharacterBody2D
     {
         const float gravity = 200.0f;
-        Vector2 velocity;
 
         public override void _PhysicsProcess(float delta)
         {
@@ -189,8 +187,6 @@ This adds basic support for walking when pressing left and right:
     const GRAVITY = 200.0
     const WALK_SPEED = 200
 
-    var velocity = Vector2()
-
     func _physics_process(delta):
         velocity.y += delta * GRAVITY
 
@@ -201,11 +197,8 @@ This adds basic support for walking when pressing left and right:
         else:
             velocity.x = 0
 
-        # We don't need to multiply velocity by delta because "move_and_slide" already takes delta time into account.
-
-        # The second parameter of "move_and_slide" is the normal pointing up.
-        # In the case of a 2D platformer, in Godot, upward is negative y, which translates to -1 as a normal.
-        move_and_slide(velocity, Vector2(0, -1))
+        # "move_and_slide" already takes delta time into account.
+        move_and_slide()
 
  .. code-tab:: csharp
 
@@ -216,8 +209,6 @@ This adds basic support for walking when pressing left and right:
         const float gravity = 200.0f;
         const int walkSpeed = 200;
 
-        Vector2 velocity;
-
         public override void _PhysicsProcess(float delta)
         {
             velocity.y += delta * gravity;
@@ -235,10 +226,7 @@ This adds basic support for walking when pressing left and right:
                 velocity.x = 0;
             }
 
-            // We don't need to multiply velocity by delta because "MoveAndSlide" already takes delta time into account.
-
-            // The second parameter of "MoveAndSlide" is the normal pointing up.
-            // In the case of a 2D platformer, in Godot, upward is negative y, which translates to -1 as a normal.
+            // "MoveAndSlide" already takes delta time into account.
             MoveAndSlide(velocity, new Vector2(0, -1));
         }
     }

tutorials/physics/physics_introduction.rst

@@ -439,8 +439,6 @@ the ground (including slopes) and jump when standing on the ground:
     var jump_speed = -1000
     var gravity = 2500
 
-    var velocity = Vector2()
-
     func get_input():
         velocity.x = 0
         var right = Input.is_action_pressed('ui_right')
@@ -457,7 +455,7 @@ the ground (including slopes) and jump when standing on the ground:
     func _physics_process(delta):
         velocity.y += gravity * delta
         get_input()
-        velocity = move_and_slide(velocity, Vector2(0, -1))
+        move_and_slide()
 
  .. code-tab:: csharp
 
@@ -469,8 +467,6 @@ the ground (including slopes) and jump when standing on the ground:
         private float _jumpSpeed = -1000;
         private float _gravity = 2500;
 
-        private Vector2 _velocity = new Vector2();
-
         private void GetInput()
         {
             _velocity.x = 0;
@@ -491,7 +487,7 @@ the ground (including slopes) and jump when standing on the ground:
         {
             _velocity.y += _gravity * delta;
             GetInput();
-            _velocity = MoveAndSlide(_velocity, new Vector2(0,-1));
+            MoveAndSlide();
         }
     }